Video and General Performance Verification
External Referen ce Lock
Range (Option C PS)
Vary the time ba
se of the reference to measure lock range.
1. Press FACTORY on the waveform rasterizer.
2. Connect the TG2000 AVG1 to Composite A and loop through to the Ref
input. Terminate the other side of the Reference loop through.
3. Press Cmpst A to select the Composite A input.
4. Press EXT to set the reference to external.
5. Adjust the AVG1 time base offset to –50 ppm. Confirm that the VECTOR and
WFM displays are stable and that the readout in the lower-left corner of the
display does not indicate an unlocked signal. (It is normal for the system to
momentarily lose lock when the time base is changed.)
6. Increase the negative time base offset until the system cannot sustain lock.
Record the maximum offset capability in the test record.
7. Repeat steps 5 and 6 for positive time base offsets.
VITC Decoding
Functionality (Option
CPS)
Apply an NTSC signal with VITC and verify that the VITC is correctly decoded.
1. Press FACTORY on the waveform rasterizer.
2. Route
the NTSC signal from the AVG1 to the VITC encoder.
3. Connect the output of the VITC encoder to one of the Composite A input
conn
ectors and terminate the other connector.
4. Select CMPST A on the front panel.
5. Press the CONFIG button and then select Aux Data Setting > TimeCode
Display if present > VITC.
6. Press CONFIG again to exit the menu.
7. Verify that Decoded VITC is displayed in the lower-right corner of the
waveform rasterizer display.
8. Verify that the VITC is correct and record Pass or fail in the test record.
Waveform Rasterizers Specifications and Performance Verification 109
To Next Page
Loading...
Need help?
General
